Microbially induced corrosion can cause pitting corrosion. This results in small, localized areas of damage on the metal surface that can spread deeper, ultimately causing damage to your pipes and water distribution systems. Pitting is particularly treacherous because it is often difficult to see from the outside, while the internal damage continues to spread. Prevent this invisible damage by tackling biofilm and microbially induced corrosion in time.

What is pitting corrosion?

Pitting corrosion is a possible consequence of microbially induced corrosion (MIC). It is one of the more treacherous forms of corrosion because it mainly occurs beneath the surface. As a result, it can remain undetected for a long time and ultimately lead to leaks, pressure loss, or structural damage to pipes and installations, which can disrupt the production process.

The main reason for this phenomenon is biofilm: a slimy layer of microorganisms that adheres to metal surfaces and is a source of bacteria, viruses, yeasts, and fungi. These organisms can corrode the metal and create the characteristic pits.

Proper disinfection and microbiological control can remove biofilm, thereby minimizing the risk of MIC and pitting corrosion.

Preventing MIC and pitting

To prevent pitting corrosion, it is important to look at the source of this problem. Biofilm is the cause of MIC, and proper disinfection is important to remove it. The Watter system contributes to this by producing an in-situ disinfectant based on hypochlorous acid (HOCl). This agent is continuously added to the water circuit, which not only removes biofilm but also prevents its return.

The in situ produced desinfectant is extremely effective against a broad spectrum of bacteria, viruses, fungi, and yeasts and is also approved for PT4 for cleaning pipes and process equipment in the food industry.

What makes Watter's HOCl unique?

In addition to its effectiveness against biofilm, HOCl is also a much milder and pH-neutral agent compared to conventional cleaning agents such as chlorine dioxide and hydrogen peroxide. These agents are often more aggressive acids that can damage the material. They also often require much higher concentrations to be effective.

In contrast, the HOCl produced by Watter is used in very low concentrations (250 ppm) to achieve the same effectiveness as conventional agents. In addition, no PPE (personal protective equipment) is required during use. In-situ production also saves on transport, storage, and handling of chemicals.

HOCl is therefore the ideal solution for removing biofilm, maintaining clean pipes, and thus preventing MIC and pit corrosion.